Factors Controlling the Strength of Composite Materials (Interphase Fracturing of Composite Bodies)
Abstract
The effect of mechanical and chemical processing variables on the fracture toughness of adhesive joints was investigated. Two adhesive systems were used. Most of the studies were made on aluminum adherends although some data were collected on steel and glass adherends as well. Fracture toughness was markedly influenced by the chemical variables, which included epoxy system, ratio of epoxy to hardener, and post-cure temperature. The toughness of one epoxy increased with post-cure temperatures up to 210 deg F after which the toughness decreased. These changes in toughness were not apparent in smooth tensile properties of bulk epoxy samples. Fracture toughness data on the bulk epoxy has not been collected as yet.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 17, 1964
- Accession Number
- AD0452901
Entities
People
- E. J. Ripling
- S. Mostovoy
Organizations
- Materials Research Laboratory